Bad gas?

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Picked up a new tank of 75/25 argon/co2 for my mig and noticed the first couple of minutes of welding had porosity issues.... kind of acted like a wind would come up and blow the shielding gas away.  Seems like the more I have welded the more it has improved....Anyone ever experience the same?  It almost acts like there is some oxygen in the top of the tank.The Lord has declared, "This is my work and my glory--to bring to pass the immortality and eternal life of man"  Moses 1:39Link: My name is John, and I am a member of The Church of Jesus Christ of Latter-Day Saints.-- ColdCreekWorks.com --
Reply:I really wanted to make a comment but I see you are serious....Could be.  I tend to blow off a newly purchased bottlr of shielding gas for a minute to clear the valves and regulator anyway.
Reply:Ya, I figured with a title like that I might get some interest in the thread.The Lord has declared, "This is my work and my glory--to bring to pass the immortality and eternal life of man"  Moses 1:39Link: My name is John, and I am a member of The Church of Jesus Christ of Latter-Day Saints.-- ColdCreekWorks.com --
Reply:Im assuming you cracked the bottle to clear the crap out and then checked for leaks after hooking up correct?Also assuming your welding with hard wire as flux will shield itself. Ive never had a problem with the actual gas so cant comment on that. Just make sure you dont have any leaks. See if you can feel the gas on your face.
Reply:I'm not sure you can even get a bad batch of MIG gas.  IIRC some mixes come with oxygen in them.  Check for leaks or other contamination issues.My name's not Jim....
Reply:I got what I assume was bad gas from Praxair one time....same result, like no gas at all (but it was flowing).  Brand new refill.  Took it back, exchanged for another, worked fine.  I figured maybe they refilled with something other than 75/25.Last time I exchanged, rushed to get there on a Friday afternoon, and got there right at closing time.  On Saturday morning, set out to start work, hooked up regulator.  Zero pressure.  Yep, they sold me an empty.
Reply:Hell I'll do it. I get it from anything with a lot of cheese, mexican food (who doesn't?), and when I drink a lot of beer and eat pretzel's.
Reply:Originally Posted by BirdIm assuming you cracked the bottle to clear the crap out and then checked for leaks after hooking up correct?Also assuming your welding with hard wire as flux will shield itself. Ive never had a problem with the actual gas so cant comment on that. Just make sure you dont have any leaks. See if you can feel the gas on your face.
Reply:As an aside, I try not to get close enough to get 'gas in my face concerning my spouse.  Under the covers is ok.  I don't get under there......My LWS has the full-empty bottles segregated.  Never had a full but empty issue.
Reply:I chatted with the Welding Supply company, and they said a month or two ago they had a bad batch of 30-50 bottles (they fill that many at once), but they move through inventory so fast that there isn't a chance that I got one of those bottles.They said weld with it some more though, and if I continue to have issues to bring the bottle back and they will swap it out for another one.  I plan on another welding project later this week, so I will be testing it out some more then.The Lord has declared, "This is my work and my glory--to bring to pass the immortality and eternal life of man"  Moses 1:39Link: My name is John, and I am a member of The Church of Jesus Christ of Latter-Day Saints.-- ColdCreekWorks.com --
Reply:I get really bad gas sometimes!
Reply:Just insert a garden hose into the outlet port to vent it all off at one time, instead of smaller expulsions over a longer time period. But don't do it near sparks or open flames. Ask someone to help if you need to.